file.c 1.1 KB

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  1. /*
  2. * linux/fs/sysv/file.c
  3. *
  4. * minix/file.c
  5. * Copyright (C) 1991, 1992 Linus Torvalds
  6. *
  7. * coh/file.c
  8. * Copyright (C) 1993 Pascal Haible, Bruno Haible
  9. *
  10. * sysv/file.c
  11. * Copyright (C) 1993 Bruno Haible
  12. *
  13. * SystemV/Coherent regular file handling primitives
  14. */
  15. #include "sysv.h"
  16. /*
  17. * We have mostly NULLs here: the current defaults are OK for
  18. * the coh filesystem.
  19. */
  20. const struct file_operations sysv_file_operations = {
  21. .llseek = generic_file_llseek,
  22. .read = do_sync_read,
  23. .aio_read = generic_file_aio_read,
  24. .write = do_sync_write,
  25. .aio_write = generic_file_aio_write,
  26. .mmap = generic_file_mmap,
  27. .fsync = sysv_sync_file,
  28. .sendfile = generic_file_sendfile,
  29. };
  30. const struct inode_operations sysv_file_inode_operations = {
  31. .truncate = sysv_truncate,
  32. .getattr = sysv_getattr,
  33. };
  34. int sysv_sync_file(struct file * file, struct dentry *dentry, int datasync)
  35. {
  36. struct inode *inode = dentry->d_inode;
  37. int err;
  38. err = sync_mapping_buffers(inode->i_mapping);
  39. if (!(inode->i_state & I_DIRTY))
  40. return err;
  41. if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
  42. return err;
  43. err |= sysv_sync_inode(inode);
  44. return err ? -EIO : 0;
  45. }